Nope.  You verified what I believed to be the case.  Although the
documentation suggests otherwise, and something that the original poster is
experiencing does as well, it's nice to see that it works as I thought it
should -- at least somewhere. ;)

Thanks.

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Crowey
Sent: Tuesday, July 07, 2009 10:52 PM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] Synthetic Backups



cpreston wrote:
> And you're verifying that the original full does not need to be kept
around?
> 


OK ... I missed two important points I guess.  With a 1 month retention
period, I always have 4 (weekly) synthetic backups in my library, and so yes
I've never had any problem about recovering files very quickly that were/are
less than one month old.

However, we do also have another separate policy that duplicates the most
recent synthetic copy to another set of tapes for our EOM set.

And, again, I've restored from our EOM tapes (from various months/years)
more than enough times to know that the process works just fine.

And I do know for sure that we do not keep an initial full backup - it
expires (after one month) like any other backup.  Its the seed for the
initial synthetic, but then its no longer required - moreover, its no longer
useful (in the synthetic backup process) if you don't have differentials
that date back to the creation of that 'seed' full backup.

Is that clearer? Anything else that I missed?

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